SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9f70be6dcd71be57bf517e28d945f3e7ea2588c126e6b928289564c953532483' 
  AND token = 'w+/uygEWpQv1nT89FAWNUvk0dhOad9RvfmHgROzWl+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}